added "doublezeta" glyph

stepmania/Themes/default/Fonts/_misc 16px.ini

@@ -6,6 +6,7 @@
 4=4
 5=20
 6=4
+7=24
 
 AddToAllWidths=2
 Top=8
@@ -19,3 +20,4 @@ map leftarrow=3
 map uparrow=4
 map rightarrow=5
 map downarrow=6
+map doublezeta=7

stepmania/src/Song.cpp

@@ -712,6 +712,7 @@ void Song::ReCalulateRadarValuesAndLastBeat()
 
 		/* Artists: */
 		ttab.push_back(TitleTrans("", "", "Omega", "", "", "ω") );
+		ttab.push_back(TitleTrans("", "", "ZZ", "", "", "&doublezeta;") );
 
 		/* 亜熱帯マジ-SKA爆弾 (serious tropical ska bomb? ruh roh) */
 		ttab.push_back(TitleTrans("", "", "^Anettai Maji.*Ska (Bakudan|Bukuden)", "", "", "&anettai1;&anettai2;&anettai3;&kma;&kji;-SKA&bakudan1;&bakudan2;") );